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Old 21st September 2010, 04:31 PM   #1
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Default Dipole XT25

Hey all.

I read somewhere ages ago that the rear cup on the Vifa Xt-25 can be removed.

I cant for the life of me find the original thread and need some advice as the cups on mine seem to be glued on really well.

If anybody has tried this and has any advice it would be greatly appreciated along with any listening impressions.

Cheers all
Dean
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Old 21st September 2010, 04:49 PM   #2
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Should have written 'modding the xt25' as subject. ooops
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Old 22nd September 2010, 01:40 AM   #3
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bump.... Cheers for reading.
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Old 22nd September 2010, 02:31 AM   #4
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Perhaps i could use some sort of solvent to break down the glue? Does anybody know of a suitable product?
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Old 22nd September 2010, 03:14 AM   #5
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Ahh found it.. All sorted

Thanks all readers
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Old 22nd September 2010, 07:01 AM   #6
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Not excactly what you are after, but a link to some mods for this tweeter.
HIFI4ALL.DK Forum: Modifikasjon av Vifa XT25

The guy who did this was at my house and got some tips before he made the modifications.

Use the same way to remove the rear cup. The glue will loosen with water.
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Old 26th September 2010, 01:11 AM   #7
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Quote:
Originally Posted by thunk303 View Post
Hey all.

I read somewhere ages ago that the rear cup on the Vifa Xt-25 can be removed.

I cant for the life of me find the original thread and need some advice as the cups on mine seem to be glued on really well.

If anybody has tried this and has any advice it would be greatly appreciated along with any listening impressions.

Cheers all
Dean
I like the Vifa xt25 because it has response which goes well beyond 20khz. In my experiments with it, I found that distortion becomes a problem due to the small radiating area. This problem would be exacerbated if you removed the rear cup.

Not to say it's a bad tweeter; it's not. But if you're going to go dipole, you might consider using a steep crossover at an unusually high frequency. Basically a supertweeter.

If I were going to do a dipole tweeter, I'd start with the BG NEO3. While the polar response of the xt25 is better behaved, the NEO 3 has advantages in a dipole config due to it's much larger radiating area. (And this is also why the polar response suffers.)

As usual, it's a series of tradeoffs.

Take a look at some of my threads over on diymobileaudio for more details. I've used the Vifa XT25, along with a series of compression drivers. (which I prefer.)
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